• [1]

    C. Patrignani et al (Particle Data Group), Chin. Phys. C, 40:100001 (2016)

  • [2]

    A. Pevsner et al, Phys. Rev. Lett., 7:421 (1961); G. R. Kalbfleisch et al, Phys. Rev. Lett., 12:527 (1964); M. Goldberg et al, Phys. Rev. Lett., 12:546 (1964)

  • [3]

    P. Bickert, P. Masjuan, and S. Scherer, Phys. Rev. D, 95:054023 (2017)

  • [4]

    S. Weinberg, Phys. Rev. D, 11:3583 (1975); G. A. Christos, Phys. Rept., 116:251 (1984)

  • [5]

    L. A. Harland-Lang, V. A. Khoze, M. G. Ryskin and A. G. Shuvaev, Phys. Lett. B, 770:88 (2017); S. D. Bass, arXiv:hep-ph/0108187

  • [6]

    A. A. Osipov, B. Hiller, A. H. Blin, and J. Moreira, Acta Phys. Polon. Supp., 9:413 (2016)

  • [7]

    C. Gatto, B. F. Enriquez, and M. I. P. Morales, PoS ICHEP2016:812 (2016)

  • [8]

    M. Ablikim et al (BESⅢ Collaboration), Chin. Phys. C, 41:013001 (2017)

  • [9]

    M. Ablikim et al (BESⅢ Collaboration), Phys. Rev. D, 87:092011 (2013)

  • [10]

    M. Ablikim et al (BESⅢ Collaboration), Phys. Rev. D, 92:012001 (2015)

  • [11]

    M. Ablikim et al (BESⅢ Collaboration), Phys. Rev. D, 92:012014 (2015)

  • [12]

    M. Ablikim et al (BESⅢ Collaboration), Phys. Rev. Lett., 112:251801 (2014)

  • [13]

    M. Ablikim et al (BESⅢ Collaboration), Phys. Rev. D, 92:051101 (2015)

  • [14]

    M. Ablikim et al (BESⅢ Collaboration), Phys. Rev. D, 93:072008 (2016)

  • [15]

    Z. Y. Deng et al, Chinese Phys. C, 30:371 (2006)

  • [16]

    S. Jadach, B. F. L. Ward, and Z. Was, Comput. Phys. Commun., 130:260 (2009)

  • [17]

    S. Jadach, B. F. L. Ward, and Z. Was, Phys. Rev. D, 63:113009 (2001)

  • [18]

    R. G. Ping, Chinese Phys. C, 32:599 (2008); D. J. Lange, Nucl. Instrum. Meth. A, 462:152 (2001)

  • [19]

    J. C. Chen, G. S. Huang, X. R. Qi, D. H. Zhang, and Y. S. Zhu, Phys. Rev. D, 62:034003 (2000)

  • [20]

    W. D. Li et al, Proceeding of CHEP06, Mumbai, India (2006)

  • [21]

    Z. Y. Zhang, L. Q. Qin, and S. S. Fang, Chin. Phys. C, 36:926 (2012)

  • [22]

    Thimo Petri, arXiv:1010.2378[nucl-th]

  • [23]

    B. R. Holstein, Phys. Scripta, T99:55 (2002)

  • [24]

    R. Arnaldi et al (NA60 Collaboration), Phys. Lett. B, 757:437 (2016); P. Adlarson et al (A2 Collaboration at MAMI), Phys. Rev. C, 95:035208 (2017); R. I. Dzhelyadin et al, Phys. Lett. B, 94:548 (1980); R. Arnaldi et al (NA60 Collaboration), Phys. Lett. B, 677:260 (2009); H. Berghuser et al, Phys. Lett. B, 701:562 (2011); P. Aguar-Bartolome et al (A2 Collaboration at MAMI), Phys. Rev. C, 89:044608 (2014)

  • [25]

    M. Kawaguchi and S. Matsuzaki, Eur. Phys. J. A, 53:68 (2017)

  • [26]

    L. G. Landsberg, Phys. Rept., 128:301 (1985)

  • [27]

    M. Bando, T. Kugo and K. Yamawaki, Phys. Rep., 164:217 (1988)

  • [28]

    M. Harada and K. Yamawaki, Phys. Rep., 381:1 (2003)

  • [29]

    L. W. Bartel et al (JADE Collaboration), Phys. Lett. B, 113:190 (1982); H. Behrends et al, Phys. Lett. B, 114:78 (1982); C. Berger et al (PLUTO Collaboration), Phys. Lett. B, 142:125 (1984); M. Althoff et al (TASSO Collaboration), Phys. Lett. B, 147:487 (1984); H. Aihara et al (TPC/Two Gamma Collaboration), Phys. Rev. D, 35:2650 (1987); H. Albrecht et al (ARGUS Collaboration), Phys. Lett. B, 199:457 (1987); S. Bityukov et al, Z. Phys. C, 50:451 (1991)

  • [30]

    J. Wess and B. Zumino, Phys. Lett. B, 37:95 (1971); E. Witten, Nucl. Phys. B, 223:422 (1983)

  • [31]

    A. Abele et al (Crystal Barrel Collaboration), Phys. Lett. B, 402:195 (1997); R. R. Akhmetshin et al (CMD-2 Collaboration), Phys. Lett. B, 527:161 (2002); M. Benayoun et al, Z. Phys. C, 58:31 (1993)

  • [32]

    G. J. Gounaris and J. J. Sakurai, Phys. Rev. Lett., 21:244 (1968)

  • [33]

    F. Stollenwerk et al, Phys. Lett. B, 707:184 (2012)

  • [34]

    C. Hanhart et al, Eur. Phys. J. C, 77:98 (2017)

  • [35]

    A. Faessler, C. Fuchs, and M. Krivoruchenko, Phys. Rev. C, 61:035206 (2000)

  • [36]

    B. Borasoy and R. Nissler, Eur. Phys. J. A, 33:95 (2007)

  • [37]

    C. Terschlsen, S. Leupold, and M. Lutz, Eur. Phys. J. A, 48:190 (2012)

  • [38]

    C. Hanhart et al, Eur. Phys. J. C, 73:2668 (2013)

  • [39]

    G. Colangelo, J. Gasser and H. Leutwyler, Nucl. Phys. B, 603:125 (2001); W. A. Bardeen, Lowell S. Brown, B. W. Lee, and H. T. Nieh, Phys. Rev. Lett., 18:1170 (1967); K. Kampf et al, Phys. Rev. D, 84:114015 (2011); P. Guo et al, Phys. Rev. D, 92:054016 (2015); P. Guo et al, Phys. Lett. B, 771:497 (2017); G. Colangelo et al, Phys. Rev. Lett., 118:022001 (2017); M. Albaladejo and B. Moussallam, Eur. Phys. J. C, 77:508 (2017)

  • [40]

    M. Ablikim et al (BESⅢ Collaboration), Phys. Rev. Lett., 108:182001 (2012)

  • [41]

    F. Ambrosino et al (KLOE Collaboration), J. High Energy Phys., 05:006 (2008)

  • [42]

    A. Anastasi et al (KLOE-2 Collaboration), J. High Energy Phys., 1605:19 (2016)

  • [43]

    M. Unverzagt et al (Crystal Ball at MAMI and TAPS and A2 Collaborations), Eur. Phys. J. A, 39:169 (2009)

  • [44]

    S. P. Schneider, B. Kubis and C. Ditsche, J. High Energy Phys., 1102:28 (2011)

  • [45]

    V. Dorofeev et al, Phys. Lett. B, 651:22 (2007); M. Ablikim et al (BESⅢ Collaboration), Phys. Rev. D, 83:012003 (2011); A. M. Blik et al, Phys. At. Nucl., 72:231 (2009); D. Alde et al (Serpukhov-Brussels-Los Alamos-Annecy(LAPP) Collaboration), Phys. Lett. B, 177:115 (1986); R. A. Briere et al (CLEO Collaboration), Phys. Rev. Lett., 84:26 (2000)

  • [46]

    B. Kubis and S. P. Schneider, Eur. Phys. J. C, 62:511 (2009)

  • [47]

    F.-K. Guo, B. Kubis, and A. Wirzba, Phys. Rev. D, 85:014014 (2012)